Knife fastener



FIG. 1 is a bottom perspective view of a knife fastener showing our newdesign;

FIG. 2 is a top perspective view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a front view thereof;

FIG. 6 is a back view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a top view thereof.

CLAIM The ornamental design for a knife fastener, as shown anddescribed.